Hydraulic pump



April 11, 1939.`1 I D. HATHCOCK 2,154,331

HYDRAULIC PUMP Filed Feb. 9, 1938 2 Sheets-Sheet l K, y l 1 35 l.

glu/umm@ April 11, 1939.

C;4 D. HATHCOCK HYDRAULI C PUMP Filed Feb. 9, 1938 2 Sheets-Sheet 2 Patented( Apr. 11, 1939 lUNITED STATES PATENT OFFICE 11 Claims.

wells, and particularly in deep oil wells. At-

tempts have been made heretofore to overcome vthe wear and other disadvantages caused by such contaminations, by using different composition cups, leathers and even oil grooves with a view of procuring a iiuid seal between the plunger and working barrel to avoid a noticeable slippage, but as such means readily become worn, they are rendered useless, necessitating expensive repairs and replacements.

Other objects of the invention are to provide novel means for exibly attaching the sucker rod string to the plunger unit; to furnish an improved standing valve having lluid passageways so arranged as to prevent any accumulation of sand therein; and to supply a novel travelling valve.

A further object is to furnish a novel pump barrel and plungerV provided with means for conducting the sand and other gritty material which accumulates above the plunger and between the plunger and the inner surface of the barrel, into the interior of the plunger during reciprocation of the latter, whereby such gritty material is transferred from the well in suspension in the liquid, so as to prevent scoring ofthe periphery of the plunger'and the bore of the barrel.

With the foregoing objects outlined and with other objects in View which will appear as the description proceeds, the invention consists in the novel features,hereinafterdescribed in detail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings,

Fig. l is a vertical sectional view partly in elevation, of my improved pump with the plunger at the lower end of its downward stroke.r

Fig. 2 is a fragmentary vertical sectional view partly in elevation, of the pump, but showing the plunger in an abnormally lowered position and in engagement with the garbot of the standing valve, to illustrate the manner of displacing or removing the latter.

Fig. 3 is a side elevation of a grooved sleeve e forming part of the plunger assembly.

Fig. 4 is a perspective View of a spacing ring or sand retainer forming part of the plunger assembly.

Fig. 5 is a top plan View of the standing valve.

Fig. 6 is a side elevation, partly in vertical section, of the standing valve.

Figs. 7 and 8 are horizontal sectional views of the standing valve, taken respectively on the lines 'I--l and 8--8 of Fig. 6.

Referring to the drawings, 9 designates a conventional bottom shoe which has a threaded connection at I with the lower end of the working barrel II. 'Ihe shoe forms a seat I2 for the lower end of a standing valve unit I3. In accordance with the present invention, the standing valve consists of an imperforate tubular body I4 having vertically disposed internal ribs I forming a cage for a. valve member I6 which I prefer to be of ball-shape. Such valve member cooperates with a tubular seat Il that is held in position by a. conventional valve seat member I8 that is screwed into the body I'3 and cooperates with' the seat l2.

As best shown ln Figs. 6 and '7, the upper end portion of the body I3 is provided with a spider lvso as to form arc-shaped ports that communicate with the interior of the valve cage and allow uid from the well to ow through the standing valve.

The body I3 is provided at its top with a collar 2|, the 'upper edge of which is cut or shaped to form diametrically opposite substantially V- shaped crotches 22.

A garbot pin 23 has its lower end screwed into l' the spider I9, and its head 24 is of T-shape to form oppositely extending arms 25 having under surfaces downwardly inclined in opposite directions, as indicated at 20.

The plunger assembly 21, in accordance with the invention, is secured at 28, preferably by means of a threaded joint, to the sucker rod string 29. The assembly preferably consists of a split sleeve 30, the sections of which have inclined or parti-conical surfaces 3| which are engazed by a truste-conical portion 32 of the bore of a nut 33. This nut has a'threaded connection with the upper end of a sleeve 34, which has a bore-35 of larger diameter than the diameter of the sucker rod string. It will be obvious that this construction allows the sleeve 34 to be adjustably secured to the rod string at various elevations, and allows lsome laterall play between the rod string and the surface of the bore 35.

The sleeve forms a socket 36 which acts as a guide for a tubular check valve 3T that cooperates with a seat ring 38. It will be observed that the bore '39 of the check valve is also of larger diameter than the sucker rod string. Consequently, the valve is very loosely fitted around the sucker rod, and as it is guided only by the sleeve 34, the construction forms a flexible joint at this point, allowing the check valve to seat properly, even if the sucker rod string should be crooked or out of center at this point, due to various causes. The check valve, properly spaced, also works in unison with the travelling valve 40, and performs an important function when the pump is idle. Being flexibly mounted, it is properly seated at all times when the pump is not in motion, regardless of the position of the sucker rod, and consequently, it prevents the sand content in liquid above the check valve'irom settling back and interfering with the travelling valve.

The seat ring 38 is preferably screwed on to the upper end of a tubular member 4I that is connected at 42 to the travelling valve. The member 4I surrounds the tubing string, and it in turn is surrounded by one or more sleeves 43 which substantially ll theY annular space between the member 4I and the inner surface of the barrell` I I. Each sleeve has a spiral groove 44, as best shown in Fig. 3, and arranged at the lower end of each sleeve is a sand retainingA ring 45 having a pocket 46 which communicates with the lower end of the groove. Consequently, any sand travelling down the groove will eventually enter the pocket 46 and will then pass through a port 41 in the member 4I to be carried upwardly by the pumped liquid.

The travelling valve 40 is similar in construction to the standing valve I3, and the plunger assembly adjacent to the travelling valve is pref- L erably provided with conventional packing rings 48 and 49. y

Threaded collars 50 and 5I are secured to the lower end of the travelling valve, andthe collar 5I has a laterally'elongated bore 52 to receive the head 24 of the garbot. Withinthis bore there are shoulders 53 (see Fig. 2), to-cooperate with the inclined surfaces 26 when the plunger as-v sembly is employed in lifting the standing valve.

The lower end of the member 5| is provided with diametrically opposite V-shaped edge portions 54 designed to engage the inclined surfaces 22 for the purpose of camming the -shoulders 53 into engagement with the surfaces 26v when the plunger assembly is lowered sufliciently to interlock with the garbot pin 23 and the plunger assembly is turned about the vertical axis relatively to the standing valve .I 3.

Referring again to the valve seat ring 38 above described, it will be observed that the outer edge of the inclined surface of this ring is. sharpened and acts to scrape any lime or other sediment that may deposit on the barrel YI I. Thus, when the plunger assembly moves upwardly in the barrel, the seat ring 38 will act as a scraper against the inner wall of the barrel and maintain said Wall free from lime or other sediment deposits that might accumulate on said wall during the upward travel of the oil. f

,From the foregoing it is believed thatV the construction, arrangement of partsand the operation of the pump will be clear to those skilled in the art, and it is obvious that changes may be made in the details disclosed, Without departing from the spirit of the invention, as expressed in the claims. y Y

What I claim and desire to secure by letters Patent is: l

1. A reciprocating pump plunger assembly for a well pump adapted to travel vertically'in a working barrel and comprising a tubular plunger body having an upper valve seat and provided with an external spiral groove extending below said seat, a passageway placing said groove in communication with the bore of the body, a valve Y cooperating with said seat, and a travelling valve secured to the body and arranged below said spiral groove.

2. A reciprocating pump plunger assembly for a well pump adapted to travel vertically in a working barrel and comprising a tubular plunger body having an upper valve seat and provided with an external spiral groove extending below said seat, a passageway placing said groove in communication with the bore oi the body, a valve cooperating with said seat, and a travelling valve secured to the body and arranged below said spiral groove, said spiral groove being arranged in a sleeve that is detachably secured to the plunger body.

3. A reciprocating pump pump arranged to travel vertically in a working barrel and comprising a tubular plunger body having spaced groups of external spiral grooves, means including ports in the body placing the lower ends of the grooves in communication with the bore of the body, a check valve cooperating with the upper end of said bore, and a travelling valve secured to the lower end portion of the body.

4. A reciprocating pump plunger for a well pump arranged to travel vertically in a working barrel and comprising a tubular body provided with a travelling valve, a string connected to said body, a tubular check valve arranged at the upper end portion of the body and surrounding said string, said valve having a bore of materially larger diameter than the string to allow the check valve to seat without interference by the string, and means for guiding the check valve.

5. A reciprocating pump plunger for a well pump arranged to travel vertically in a working barrel and comprising a tubular body provided with a travelling valve, a string connected to said body, a tubular check valve arranged at the upper end portion of the body and surrounding said string, said Valve having a bore of materially larger diameter than the string to allow the check valve to seat without interference by the string, and means for guiding the check valve, the last mentioned means comprising a socket arranged at the upper end of the check valve and secured to the string.

6. A reciprocating pump plunger for a well pump arranged to travel vertically in a working barrel and comprising a tubular body provided with a travelling valve, a string connected to said body, a tubular check valve arranged at the upper end portion of the body and surrounding said string, said valve having a bore of materially larger diameter than the string to allow the check valve to seat without interference by the string, and means for guiding the check valve, the last mentioned means comprising a sleeve, means for adjustably connecting the sleeve to the string whereby the sleeve may be arranged at various elevations on the string, said sleeve having a socket at its bottom in which thek check valve reciprocates. Y Y

'7. A reciprocating pump plunger for a well pump arranged to travel vertically in `a working barrel and comprising a tubular body provided with a travelling valve, a string Vconnected to said body, a tubular check valve arranged at the upper end portionofthe body and surrounding said string, said valve haing a bore of materially plunger for a well larger diameter than the string to allow the check valve to seat without interference by the string, and means for guiding the check valve, the last mentioned means comprising a sleeve, means for adjustably connecting the sleeve to the string whereby the sleeve may be arranged at various elevations on the string, said sleeve having a socket at its bottom in which the check valve reciprocates, the `bore of thesleeve being of materially greater diameter than the string.

8. In a well pump of the character described, a tubular plunger assembly provided at its lower end with internal shoulders and bottom cam surfaces, a standing valve arranged below the plunger and having a garbot provided with a head having oppositely extending arms adapted to be engaged by said shoulders for lifting the standing valve by upward movement of the plunger assembly, said standing valve having cam surfaces arranged below the head of the garbot pin and adapted to cooperate with the cam'surfaces of the plunger assembly for camming said shoulders into engagement with said arms.

9. In a well pump of the character described, a tubular plunger assembly provided at its lower end with internal shoulders and bottom cam surfaces,r a standing Valve arranged below the plunger and having a garbot pin provided with a head having oppositely extending arms adapted to be engaged by said shoulders. for lifting the standing valve by upward movement of the plunger assembly, said standing valve havingi cam surfaces arranged below the head of the garbot pin and adapted to cooperate with the cam surfaces of the plunger assembly for camming said shoulders into engagement with said arms, the bottom surfaces of said arms being inclined downwardly in opposite directions.

l0; In a Well pump of the character described, a tubular plunger assembly provided at its lower end with internal shoulders and bottom cam surfaces, a standing valve arranged below the plunger and having a garbot pin provided with a head having oppositely extending arms adapted to be engaged by said shoulders for lifting the standing valve by upward movement of the plunger assembly, said standing valve having cam surfaces arranged below the head of the garbot pin and adapted to cooperate with the cam surfaces of the plunger assembly for camming said shoulders into engagement with said arms, said earn surfaces being of substantially V-shape.

11. A reciprocating pump plunger assembly for a well pump adapted to travel vertically in a working barrel and comprising a tubular plunger body having an upper valve seat and provided with an external spiral groove extending below said seat, a passageway placing said groove in communication with the bore of the body, a valve cooperating with said seat, and a travelling valve secured to the body and arranged below said spiral groove, said valve seat having a sharply defined outer edge adapted to scrape the inner wall of the working barrel.

CRAVEN D. HATI-ICOCK. 

